I don't normally take the time to change my gun nails out, so I install casing and base with 2" nails. 1.25" nails would be good shooting the casing to the jamb.

[This message has been edited by whit.millwork (edited December 17, 2003).]

For the thinner part of casement moldings I use to use 4d finish nails, and 6 or 8 for thicker side and baseboard.

I predrill each so I don't split the wood, I typically install oak. Put a nail in your drill and use it as the drill bit.

I now use a 18 ga. finish nailer and use 1 5/8 for thicker boards and 1 for the thinner part of casement millwork.

Depending on the situation, I've used a finish nailer with 15 gauge 1 1/2" to 2 1/2" nails in it. Alternate is using a 18 gauge brad nailer with 1" to 1 1/2" nails.

The older and more brittle the wood, the use of a smaller diameter nail reduces the chance of the wood splitting.